초록 ▼

A three-way conversion catalyst useful for the treatment of exhaust gas streams to accomplish the catalytic oxidation of carbon monoxide and hydrocarbons and the catalytic reduction of the oxides of nitrogen has a catalyst carrier such as cordierite coated with an oxygen reservoir layer, and a secon

A three-way conversion catalyst useful for the treatment of exhaust gas streams to accomplish the catalytic oxidation of carbon monoxide and hydrocarbons and the catalytic reduction of the oxides of nitrogen has a catalyst carrier such as cordierite coated with an oxygen reservoir layer, and a second layer of finely divided nickel needles obtained by reduction of Ni2+in an autoclave and a platinum group metal.

대표청구항 ▼

A catalyst for purification of exhaust gases comprising a catalyst carrier and first and second catalyst layers formed as discrete layers one over the other on the catalyst carrier with the first layer being formed between the catalyst carrier and the second layer, wherein the first layer comprises

A catalyst for purification of exhaust gases comprising a catalyst carrier and first and second catalyst layers formed as discrete layers one over the other on the catalyst carrier with the first layer being formed between the catalyst carrier and the second layer, wherein the first layer comprises a material effective to provide an oxygen reservoir during catalysis; and the second layer comprises nickel and a platinum group metal, wherein the nickel is present as finely divided needles distributed over the surface of the catalyst.